I have only to request that you will bear in mind certain established truths, which occasionally escape your memory when you are reading a work of fiction.

He stared at the flames, unblinking, to force himself into a complete obedience to an established truth.

The doubt could be whispered in the 1930s, shouted in the 1940s and tacitly accepted as an established truth in the 1950s.

The heresy of one age becomes the established truth of the next.

Rutimeyer claimed that Haeckel "had taken to kinds of liberty with established truth."

It is but a small step from listening to heresy to questioning established truth, Brutha.

Some of those early predictions were described as "established truth", and "beyond a doubt".

"So the writer is simply repeating established truths?"

How could it be the established truth of his soul when his eyes kept being drawn towards the street gate?

That is an established truth, and common knowledge.